Finally your map is starting to look awesome! Please fucking continue!
@supertanker: Don't be stupid like me and set _lms to a low value in the worldspawn. It applies high resolution lightmaps to everything, including all those spots where you would never notice them. Best thing to do is to func_group specific pieces of your map and applying a low _lms to it. That way you have the best trade-off between looks, compile time and BSP size, not to mention the loading times of the map:)